Having finally managed to get my windows store app published, it is appearing in the store without its logo. The logo file specified is a PNG file and is 150 x 150. Clearly I need to link this in somewhere else, although I am at a loss to see where. Could anyone point me in the right direction?
In the package-appmanifest file, under the packaging tab there is a "Logo" field. This is where the store logo should be defined.